Private wells in North Texas are not regulated at the tap. The EPA sets drinking water standards for municipal supplies, but if your home is on a well, the responsibility for testing and treatment sits with you. That is not a burden, it is just a fact worth planning around, especially in the rural pockets of Collin County outside Farmersville, Van Alstyne, and Anna.
Iron is the contaminant we see most often. Water leaves the well clear, then turns orange in a toilet tank or on a white shirt after the wash. That is dissolved iron oxidizing when it meets air. Even small amounts stain fixtures and laundry. Larger amounts foul softener resin and coat RO membranes, which is why iron removal always sits upstream of anything else in a treatment train.
Hydrogen sulfide, the rotten egg gas, is the second most common complaint. It is often worst in the hot water because heat drives the gas out of solution. Iron and sulfur are usually handled together with an air-injection or catalytic media filter sized to the parts-per-million measured in the water test.
Hardness is a given. North Texas geology delivers hard water to wells just as reliably as it does to municipal supplies. A softener handles this once iron is out of the picture.
Bacteria are the concern with the biggest safety implications. Coliform and E. coli tests are worth running when the well is drilled, after any repair, after a flood, and at least once a year for peace of mind. If bacteria are detected, the well should be shock chlorinated and a UV disinfection stage installed at the end of the treatment train. UV inactivates bacteria and viruses without adding chemicals, and lamps are replaced on a yearly schedule.
Nitrates are worth a look for wells near agricultural operations. Elevated nitrates matter most for infants and are addressed with reverse osmosis or a dedicated nitrate filter at the kitchen tap.
The right answer for any specific well is not a package. It is a system designed from actual test numbers, which is why every well referral we make starts with a free in-home water test. If you want to see how the pieces fit together, our well water treatment overview walks through a typical Collin County setup.